Wire-cutting device

ABSTRACT

A wire-cutting device, mainly for stator-winding machines, wherein the cutting device has movable double-bladed cutters one end of which is accommodated in the slots of the rotating slotted cutters and the other end is connected by pins with the drive. The ends of the movable double-bladed cutters accommodated in the slots of the slotted cutters are hook-shaped for gripping and pulling off the wires and the drive consists of a gear wheel meshing with other gears which latter are connected by pins with the movable double-bladed cutters.

United States Patent [56] References Cited UNITED STATES PATENTS 9/1960 Larsh et 10/1967 Primary Examiner-James M. Meister Fedor Grigoricvich Klevanov, Ulitsa Kotovsltogo, 62-a; Viktor Semenovich Frolov, 1. Navy Pereulolr, 12, all 01 Kharkov, U.S.S.R. [21 1 Appl. No. 834,394 An0rneyWaters, Roditi, Schwartz & Nissen [22] Filed June 18, 1969 [45] Patented June 29, 1971 ABSTRACT: A wire-cuttin g device, mainly for stator-winding machines, wherein the cutting device has movable doublebladed cutters one end of which is accommodated in the slots' of the rotating slotted cutters and the other end is connected by pins with the drive. The ends of the movable double-bladed 83/513, cutters accommodated in the slots of the slotted cutters are [54] WIRE-CUTTING DEVICE 2 Claims, 3 Drawing Figs.

ehd mm h dwh n b as. me 8 .1 b .m w Wkufl e e m m a fiMw O m 5g .m .m US P dmw T MB 8 .1 .m w Ww i d wa r m e cm n d m CB PS amm fic m he e o. mn onmu hdlc 10.1 6 m66 155 4 3 an an 1, Nun 3 u "M ,mm2 m 1% fimm/ 3 u u I 8 u 3 mmO n7 mm w mh m d M hr. 1] 0 55 [l WIRE-CUTTING DEVICE The present invention relates to mechanisms and more specifically it relates to the wire-cutting devices of statorwinding machines.

Known in the art is a wire-cutting device consisting of an axially movable bushing with hooks, a rotating ring with cutters, and a wire-clamping ring.

A disadvantage of known device lies in the necessity for the operator to perform a number of complex successive operations, such as:

moving the bushing with wire-gripping hooks into the winding zone between the stator and the winding head so as to allow the hooks to grip the winding wires;

gripping the wires and shifting them by the hooks, which is done by turning the bushing;

moving the bushing with the wire-gripping hooks in the reverse direction so as to pull off and clamp the wires; cutting the wires by turning the ring with cutters.

Thus, the operator of known device has to perform four successive operations which makes his work complicated and inconvenient, and increases the wire-cutting time.

Moreover, in case of large stators, the movable elements are very heavy thus are difficult to handle.

An object of the present invention resides in eliminating the aforesaid disadvantages.

The main object of the invention consists in providing a device for pulling off, clamping and cutting the wires all in one operation, thus promoting the convenience for the operator and stepping up the labor efficiency.

According to the invention, this object is carried into effect by providing a wire-cutting device, mainly of stator-winding machines, comprising a cutting device with a drive, wherein said cutting device comprises movable double-bladed cutters, one end of which is accommodated in the slots of the rotating slotted cutters while the other end is connected by pins with the drive, the ends of the movable double-bladed cutters located in the slots of the slotted cutters being shaped like hooks for gripping and pulling off the wires.

It is expedient that the drive be made in the form of a gear wheel meshing with the gears which are connected by pins with the movable double-bladed cutters.

The device according to the invention has a rigid kinematic linkage between all the units, it does not require any complex hydraulic or electric devices, which improves its reliability, reduces the manufacturing cost and dispenses with the necessity for skilled operators in view of absence of a number of complex operations.

Now the invention will be described in detail by way of example with reference to the accompanying drawings in which:

FIG. 1 is a general plan view of the device according to the invention;

FIG. 2 is a section taken along line "-1! of FIG. 1.

FIG. 3 is a sectional view of a two bladed cutter, a rotating slotted cutter and a clamp in the position corresponding to gripping and cutting the wire, on enlarged scale.

A body 1 (FIGS. 1 and 2) accommodates an internal gear wheel 2 which can be turned by a handle 3 around axis A in the directions shown by arrows 4 and 5. The gear wheel 2 engages the gears 6 which rotate around their axes B in the directions shown by arrows 7 and 8. Rotation of the gear wheel 2 is limited by stops 9 and 10 so that, while the gear wheel 2 turns from one stop to the other (in either direction), the gears 6 make a complete revolution around the axes B. Double-bladed cutters 12 are articulated to the gears 6 by means of the pins 11, the front ends of these cutters being aecommodated in the slots of the slotted cutters 13 with cutting edges 14. The front parts of the double-bladed cutters 12 are shaped like hooks 15 with cutting edges 16.

As the gears 6 rotate, the cutters 12 move radially in the slots of the slotted cutters 13 which reciprocate and swing around the axes C in the directions shown b arrows l7 and 18. The ends of the double-bladed cutters l with the hooks 15 move in the zone 19 of the winding wires 20. Clamps 21 with springs 22 serve for clamping the wires.

The device functions as described below.

After winding the wire on the stator 23, the winding head 24 with the winding wires 20 stopes in a position in which the wire-cutting device is located between the stator 23 being wound and the winding head 24. The gear wheel 2 is turned by the handle 3 from one stop to the other, rotating the gears 6.

The cutters 12, moving radially in the slots of the slotted cutters l3, grip the wires 20 by their front ends with the hooks l5, and pull them into the slotted cutters l3. Shown in FIG. I in thin lines are the positions occupied in turn by the hooks 15 of the cutters 12 when gripping the wires 20 in the zone 19. The wire sections 25 moving away from the winding head 24 are clamped, as shown in FIG. 3 by the slanted edges 26 of the clamps 21 while and after that the wire sections 27 moving towards the stator 23 are cut off by the cutting edges 14 and 16 of the cutters l2 and 13, when the cutters 12 are further pulled into the slots ofthe slotted cutter 13 along arrow 28.

The device functions with equal efficiency in both directions so that there is no need to return the gear wheel 2 to one of the initial positions.

The device has been disclosed on the example of winding a four-pole stator with one-position concentric winding during simultaneous winding of four coils. The number of gears with pins as well as that of the cutters and clamps with springs may differ to suit the number of simultaneously wound coils.

The drive of the wire-cutting device may take the form not only of the gear transmission, but of any other type of mechanicaltransmission.

We claim:

1. A wire-cutting device for stator-winding machines, comprising: a drive; a cutting device including movable doublebladed cutters, said double-bladed cutters having opposite ends, one end of which is connected by pins with said drive; rotating slotted cutters having slots accommodating the other end of said double-bladed cutters; the: ends of said movable double-bladed cutters accommodated in the slots of said slotted cutters being hook shaped for gripping and pulling off the wires.-

2. A wire-cutting device according to claim 1 wherein said drive includes a gear wheel meshing with other gears which latter are connected by pins with said movable double-bladed cutters. 

1. A wire-cutting device for stator-winding machines, comprising: a drive; a cutting device including movable doublebladed cutters, said double-bladed cutters having opposite ends, one end of which is connected by pins with said drive; rotating slotted cutters having slots accommodating the other end of said double-bladed cutters; the ends of said movable double-bladed cutters accommodated in the slots of said slotted cutters being hook shaped for gripping and pulling off the wires.
 2. A wire-cutting device according to claim 1 wherein said drive includes a gear wheel meshing with other gears which latter are connected by pins with said movable double-bladed cutters. 